Android fragments - findFragmentByTag always returns null
18,496
In your code you haven't mentioned tag in replace method So,
Use this structure of replace method of fragment
ft.replace(R.id.container, newFragment,"fragment_tag_String");
Refer this link for more information. fragment replace with tag name
Author by
maxdownunder
Updated on July 23, 2022Comments
-
maxdownunder almost 2 years
I've had a look around and found a couple of questions with a similar topic, but nothing that helped in my case. I'm trying to access an existing active fragment using getSupportFragmentManager().findFragmentByTag(TAG), but it always returns null. Replies on similar questions suggested that it takes a while for the commit to be executed, so calling findFragmentByTag would return null if called too early. I've tried two things:
- add getSupportFragmentManager().executePendingTransactions()
immediately after the commit, but still get null. - added a button... pressing this after the activity has been created, the fragment registered and the view displayed should leave the system enough time to commit. But i still get null.
Here's my activity:
public class MainActivity extends ActionBarActivity { private static final String F_SETTINGS = "f_settings"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button btn = (Button) findViewById(R.id.btn); btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { debug(); } }); if (savedInstanceState == null) { FSettings newFragment = new FSettings(); FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); ft.replace(R.id.container, newFragment); ft.addToBackStack(F_SETTINGS); ft.commit(); // getSupportFragmentManager().executePendingTransactions(); //// Activating this did not make any difference... } debug(); } private void debug() { String txt = "null"; Fragment frag = getSupportFragmentManager().findFragmentByTag(F_SETTINGS); if (frag != null) { txt = frag.toString(); } Log.i("Testing", txt); }
}
What am I doing wrong here? Cheers, Max
- add getSupportFragmentManager().executePendingTransactions()
-
maxdownunder almost 11 yearsOh dear, you wouldn't believe how long I stared at the code to figure whats wrong... thanks, works now.
-
Dr.jacky almost 10 yearsPlease see my related question: stackoverflow.com/questions/24833912/…
-
Akshay kumar over 4 yearsThank you so much bro.